The One Where Ross Meets Elizabeth's Dad - S6-E21
Question: Estelle tells Joey about the new part she got him an audition for and says "It's kind of on the Q. T. The actor who has the part doesn't know he might be fired." What does she mean exactly by "on the q.t."?
Answer: "On the Q.T. is slang for quietly. Q.T. is an abbreviation for quiet. The phrase dates to at least 1884." Found on wordorigins.org.
Ingabritzen